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When to use EntityManager.find() vs EntityManager.getReference() with JPA
...ments PersonService {
public void changeAge(Integer personId, Integer newAge) {
Person person = em.getReference(Person.class, personId);
// person is a proxy
person.setAge(newAge);
}
}
If i call find method, JPA provider, behind the scenes, will call
SELECT NAME...
{" was not expected.} Deserializing Twitter XML
...e root attribute when de serializing at runtime.
XmlRootAttribute xRoot = new XmlRootAttribute();
xRoot.ElementName = "user";
// xRoot.Namespace = "http://www.cpandl.com";
xRoot.IsNullable = true;
XmlSerializer xs = new XmlSerializer(typeof(User),xRoot);
...
Can two different strings generate the same MD5 hash code?
...sidering the birthday paradox, given a set of 2^64 (or 18,446,744,073,709,551,616) assets, the probability of a single MD5 collision within this set is 50%. At this scale, you'd probably beat Google in terms of storage capacity.
However, because the MD5 hash function has been broken (it's vulnerabl...
Select multiple records based on list of Id's with linq
...serProfiles();
var idList = GenerateIds();
var stopWatch = new Stopwatch();
stopWatch.Start();
userProfiles.Join(idList, up => up.ID, id => id, (up, id) => up).ToArray();
Console.WriteLine("Elapsed .Join time: {0}", stopWatch.Elapsed);
stopWat...
MYSQL import data from csv using LOAD DATA INFILE
...E USING FOLLOWING QUERY :
CREATE TABLE IF NOT EXISTS `survey` (
`projectId` bigint(20) NOT NULL,
`surveyId` bigint(20) NOT NULL,
`views` bigint(20) NOT NULL,
`dateTime` datetime NOT NULL
);
YOUR CSV FILE MUST BE PROPERLY FORMATTED FOR EXAMPLE SEE FOLLOWING
ATTACHED IMAGE :
If eve...
Schema for a multilanguage database
...option nr 1 but better. It is still hard to maintain and requires creating new tables for new languages, so I'd be reluctant to implement it.
– qbeuek
Nov 27 '08 at 10:22
29
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How do I get the application exit code from a Windows command line?
...
int _tmain( int argc, TCHAR *argv[] )
{
CString cmdline(GetCommandLineW());
cmdline.TrimLeft('\"');
CString self(argv[0]);
self.Trim('\"');
CString args = cmdline.Mid(self.GetLength()+1);
args.TrimLeft(_T("\" "));
printf("Arguments passed: '%ws'\n",args);
STARTUPIN...
How to change ProgressBar's progress indicator color in Android
... android:progressDrawable="@drawable/greenprogress" />
Then create a new drawable with something similar to the following (In this case greenprogress.xml):
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item a...
List of ANSI color escape sequences
... ║
║ 2 ║ Faint (decreased intensity) ║ Not widely supported. ║
║ 3 ║ Italic ║ Not widely supported. Sometimes treated as inverse. ║
║ 4 ║ Underline...
Why am I getting 'Assembly '*.dll' must be strong signed in order to be marked as a prerequisite.'?
...s situation if:
You install a package to one project in your solution.
A new version of that package is deployed to the package source.
You install it to another project in the same solution.
This results in two projects in your solution referencing different versions of that package's assemblie...